Hacksaw-guide.



R. C. BERRY.

HAGKSAW GUIDE. APPLIOATION ;ILED JULY 13, 1912.

Patented Mar. 31, 1914.

&IMM/14014 COLUMBIA PLANOGRAPH co..wAsHlNu'mN. D. c.

UNITED STATES PATENT OFFICE.

ROBERT C. BERRY, OF INDIANAPOLIS, INDIANA.

HACKSAW-GUIDE.

To all 'whom it may concem Be it known that I, ROBERT C. BERRY, acitizen of the United States, residing at Indianapolis, in the county ofMarion and State of Indiana, have invented a new and usefulHacksaw-Gruide, of which the following is a specification.

In the operation of hack saws it is found that there is often a decidedtendency for the hack saw to swerve from the desired course, and thusmake a crooked cut. This may be due to an inequality in the setting ofthe teeth on the two sides of the saw, or to an inequalty in temperingresulting in unequal wear on the teeth set toward the two sides of thesaw.

It is the object of my present invention to hold the saw to its course.This is accomplished by providing a guide which embraces the saw bladeclose to the work and is mounted in guide-ways so that it can travel ina direction transverse to the length of the saw blade, the guide-waysbeing mounted on a plate which can be clamped between the work and thevise jaws. The guide and guide-ways are preferably so constructed thatthe guide may be turned to different angles in the guide-ways, to allowoblique saw cuts. The guide is preferably provided with a projectioncarrying a roller which coperates with the lower surface of the top ofthe saw frame to feed the guide positively as the cut deepens.

The accompanying drawings illustrate my invention.

In these drawings, Figure 1 is a fragmentary elevation of a machine hacksaw embodying my invention; Fig. 2 an enlarged section on the line 2-2of Fig. 1; Fig. 3 a section on the line 3-3 of Fig. 2; Fig. 4: aperspective view of the saw guide and its coperating parts; and Fig. 5 across sectional view showing a modified form of guide and guide-waywhich allow swiveling of the guide.

The main frame 10 of the machine is provided with vise jaws 11 forholding the work 12 in position to be sawed by the saw blade 13 carriedby the saw frame 14: reciprocably mounted on the slide 15. A plate 20may be clamped between one of the vise jaws 11 and the'work 12, saidplate 20 resting on the base plate 21 of the vise. The plate 20 isprovided at one end with two vertical arms 22 which form a guide-way fora guide 23. The guide 23 may fit in the Specificaton of Letters Patent.

Application filed July 13, 1912.

Pateted Mar. 31, 1914.

Serial No. ?09,247.

guide-way 22 either so that it can slide therein but cannot turntherein, as shown 1I1 Fig. 3, or so that it can both slide and swiveltherein, as shown in Fig. 5. The latter arrangement has the advantage ofallowing an oblique cut to be made, when desired. The guide 23 isprovided with a vertical slot 24 extending upwardly from its bottomedge, such slot being of proper size to have a sliding fit over the backedge and sides of the saw blade 13. A rod 25 projects upwardly from theguide 23, through the cap 26 which may be provided for bracing the upperends of the arms 22, and is provided at its upper end with a roller 27which is in the same plane with and just below the lower edge of thehorizontal part of the saw frame 14.

In operation, the guide 23 is placed over the saw 13 and then the work12 and plate 20 are clamped between the vise jaws 11. Then the saw frame12 is started to reciprocate. The guide 23 holds the saw 13 accuratelyto its course and slides down in the guide-ways 23 as the saw cutdeepens. In case the guide 23 fails to slide down by gravity as the saw13 descends, the saw frame 14 engages the roller 27 and forces it, andthrough it the guide 23, downward with the saw.

I claim as my invention:

1. The combination with the main frame, vise jaws, and reciprocating sawframe of a machine hack saw, of a guide which is adapted to fit over theback of the saw, a guide-way in which said guide is slidably androtatably mounted, a plate carrying said guide-way and adapted to beclamped between the work and one of the vise jaws, and a projection fromsaid guide provided at its upper end with a roller coperating with theunder side of the saw frame to feed the guide positively as the saw cutdeepens.

2. The combination with the main frame, vise jaws, and reciprocating sawframe of a machine hack saw, of a guide which is adapted to fit over theback of the saw, a guide-way in which said guide is slidably mounted, aplate carrying said guide-way and adapted to be clamped between the workand one of the vise jaws, and a projection from said guide provided atits upper end with a roller coperating with the under side of the sawframe to` ,feed the guide positively as the saw cut deepens.

3. The combination with the main frame,

vise jaws, and reciprocating saw iframe of a machine hack saw, of aguide which is adapted to fit over the back of the saw, a guide-way inwhich said guide is slidably and rotatably mounted, and a plate carryingsaid guide-way and adapted to be clamped between the work and one of thevise jaws.

4:. The combination with the main frame, vise jaws, and reciprocatingsaw frame of a machine hack saw, of a guide which is adapted to fit overthe back of the saw, a guide-way in which said guide is slida'blymounted, and a plate carrying said guideway and adapted to be clampedbetween the` work and one of the 'vise j aws.

5. The combnaton with the main frame, Vise aws, and recprocatng sawframe of a machine hack saw, of a guide which is' adapted to fit overthe back of the saw, a guide-way in which said guide is slidably androtatably mounted, a plate carrying said guide-way and adapted to beclamped between the work and one of the vise jaws, and a projection fromsaid guide coperating with the under side of the saw france to feed theguide positively as the saw cut deepens.

6. The combination with the main frame, vise jaws, and recprocating sawframe of a machine hack saw, of a guide which is adapted to fit over theback of the saw, a guide-way in which said guide is slidably mounted, aplate carrying said guide-way and adapted to be clamped between the workand one of the vise jaws, and a projection from said guide coperatingwith the under side of the saw frame to feed the guide positively as thesaw cut deepens.

7. The combination with the main frame, Vise jaws, and reciprocating sawframe of a machine hack saw, said saw-frame being provided with holdingmeans for both ends of a saw-blade and reciprocating as a unittherewith, of a guide adapted to fit over the back edge and sides of thesaw, a guide-way in which said guide is slidable, and means coperatingwith the saw frame for feeding said guide along said guide-way as thesaw cut deepens.

8. The combination with the main frame, vise jaws, and reciprocating sawframe of a machine hack saw, said saw-frame being provided with holdingmeans for both ends of a saw-blade and reciprocating as a unittherewith, of a guide adapted to fit over the back edge and sides of thesaw, and a rectilinear guide-way in which said guide is slidable.

9. As an article of manufacture, a guiding attachment for hack saws,comprising a guide adapted to fit over the back edge and sides of thesaw, a guide-way in which said guide is slidable and rotatable, a platecarrying said guide-way and adapted to be clamped in a vise with thematerial to be sawed, and a projection from said guide adapted tocoperate with the saw frame for feeding the guide along the guide-way asthe saw cut deepens.

10. As an article of manufacture, a guiding attachment for hack saws,comprisng a guide adapted to fit over the back edge and sides of thesaw, a guide-way in which said guide is slidable, a plate carrying saidguide-way and adapted to be clamped in a vise with the material to besawed, and a projection from said guide adapted to cooperate with themain frame for feeding the guide along the guide-way as the saw cutdeepens.

ll. As an article of manufacture, a guiding attachment for hack saws,comprising a guide adapted to fit over the back edge and sides of thesaw, a guide-way in which said guide is slidable and rotatable, and aplate carrying said guide-way and adapted to be clanped in a vise withthe material to be sawed. e

12. As an article of manufacture, a guiding attachment for hack saws,comprising a guide adapted to fit over the` back edge and sides of thesaw, a guide-way in which said guide is slidable, and a plate carryingsaid guide-way and adapted to be clanped in a vise with the material tobe sawed.

13. As an article of manufacture, a guiding attachment for hack saws,comprising a guide adapted to fit over the back edge and sides of thesaw, a guide-way in which said guide is slidable, and a plate carryingsaid guide-way and so located relatively thereto that when clamped'inthe saw vise with the work it supports the guide and guide-way i properposition relative to the saw.

14. As an article of manufacture, a guiding attachment for hack saws,comprising a guide adapted to fit over the back edge and sides of thesaw, a guide-way in which said guide is slidable, and a plate carryingsaid guide-way and so located relatively thereto that when clamped inthe saw vise with the work it supports the guide and guide-way in properposition relative to the saw, and a projection from said guide adaptedto cooperate with the saw frame for feeding the guide along theguide-way as the saw cut deepens.

In witness whereof, I have hereunto set my hand and seal atIndianapolis, Indiana, this 10th day of July, A. D. one thousand ninehundred and twelve.

ROBERT C. BERRY.

YVitnesses ARTHUR M. Hoo), G. B. ScI-ILEY.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C."

